The Bears announced Monday that Louis suffered a season-ending knee injury on the play.

"Jared Allen plays the game a certain way," Smith said, per the Chicago Tribune. "Good player. I think our game could do without that play. I am sure the league will look at it and they'll give an opinion about it."

An NFL spokesman acknowledged the league will review the hit, saying, "any play of that nature is reviewed to determine whether it violated the rules and warrants discipline."

That means Allen could be facing a fine from the NFL.

On the play in question, Vikings cornerback Antoine Winfield intercepted a Jay Cutler pass early in the third quarter. Louis never saw Allen coming and Allen appeared to launch himself into the head area of Louis, who wasn't looking.

Allen insisted afterward he felt he was making a legal hit.

"He's running to make a tackle, so I just went to block him," Allen said. "I never intentionally try to hurt anybody. I turned around, he was running to make a tackle, I threw myself into him to try to make a block, just like we're taught."

"I think Coach said he hurt his knee or something after that, so my condolences to him and his family. I never, ever try to intentionally hurt anybody. Just trying to make a block and spring our guys down sidelines. That's unfortunate."

Allen wouldn't speculate on the likelihood of a fine from the NFL, which has made a point of punishing players for helmet-to-helmet contact.